CVE-2020-13974

Name: CVE-2020-13974
Creator: NVD / NIST
Published: 2020-06-09T05:15:10.787+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2020-13974 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 4.4.227
Linux	Linux Kernel	>= 4.5, < 4.9.227
Linux	Linux Kernel	>= 4.10, < 4.14.184
Linux	Linux Kernel	>= 4.15, < 4.19.128
Linux	Linux Kernel	>= 4.20, < 5.4.46
Linux	Linux Kernel	>= 5.5, < 5.6.18
Linux	Linux Kernel	>= 5.7, < 5.7.2
Debian	Debian Linux	9.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932bVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aaePatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlMailing List, Third Party Advisory
https://lkml.org/lkml/2020/3/22/482Exploit, Vendor Advisory
https://usn.ubuntu.com/4427-1/Third Party Advisory
https://usn.ubuntu.com/4439-1/Third Party Advisory
https://usn.ubuntu.com/4440-1/Third Party Advisory
https://usn.ubuntu.com/4483-1/Third Party Advisory
https://usn.ubuntu.com/4485-1/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932bVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aaePatch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlMailing List, Third Party Advisory
https://lkml.org/lkml/2020/3/22/482Exploit, Vendor Advisory
https://usn.ubuntu.com/4427-1/Third Party Advisory
https://usn.ubuntu.com/4439-1/Third Party Advisory
https://usn.ubuntu.com/4440-1/Third Party Advisory
https://usn.ubuntu.com/4483-1/Third Party Advisory
https://usn.ubuntu.com/4485-1/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory

Timeline

Published: Jun 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13974?

How severe is CVE-2020-13974?

CVE-2020-13974 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13974?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13974?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST